Musical signature indicator for tuition purposes



* Jm 12 ,1926n C. LOGI-LN 4 MUSICAL SIGNATURE INDICATOR FOR TUTION PURPSES Filed Jan. 3l 1922 2 Sheets-Sheet l Mme ma? Bh/ENTOR By -a Mtofney.

Jan. 12 1926. 1,569,328

, C. LOGAN MUSICAL SIGNATURE INDICATOR FOR TUITION PURPOSES Filed Jan. 3l '1922 2 Sheets-Sheet 2 swim mm C? M ccc l A f W Chor/as Laga NVENTORQ Ahoy ne).

Patented Jan. 12, 1926.

UNITED STATES PATENT FFICE.

CHARLES LOGAN, 0E? ROCKALE. NEAR SY'EY, .NE-'W SOUTH' lFJAIJES, AUSTRALIA.

MUSCAL SIGNATURE 'QNDCATGR FOR TUITION PUR'EOSES.

ppiieation ined January ai., i922.

To (,fZ whom t lmay concern:

lie it known that T, @Hannes LoeAN, subject ot the King of Great Britain and Ireland, residing at Rockdale, near Sydney, New South lVales, Australia, have inventec certain new and useful Improvements in Musical Signature Indicators for Tuition Purposes, et which the following is a speciieation.

lVhen music tables (time signature, key signature, and enharmonic relation tables) are memorized by study from books or charts, a pupil does not readily attain clear ideas therefrom and, in most case` he does not become alert to their practical signifi canoe and application without prolonged p notice. I have therefore realized tl e desirability 'of presenting these tables in a shape in lwhich the attention ot a pupil will ,be directed in each observation made by him to particular Vgroups only of conventional indicators with essential explanatory matter in a way which will avoid risk of confusing him, or risk ot cramming his mind with irrelevant mattei'.

To this `end l' provide a pocket instrument. The conventional indicators and necessary definitive and explanatory matter relating to them are arranged in groups in radial column arrangement on sectors et a diei which is provided with a rotatable peinte-r, or alternatively is provided with a rotatable cover plate having` an aperture in it through which only one group ot indicators and the accompanying explanatory and definitive matter may be viewed atany one time. ln practice two dials are used, set respectively in the back and in the front ot' a case constructed like a watch case and i'itted with a stem Winder button for rotating the pointers or apertured cover plates to locate the observers attention at cach view on one sector only ot each dial. (ln one dial the time signatures in `general use are charted, whilst on the other dial two chartsI are shown, one segment being allocated for key signatures and thc other lor cnharmonic relations. A particular ai. rangement of the indicators and ot the defining or explanatory words is rulopteiil ie' Serial No, 533,100.

icular partot one ot the tables which t may be desired te present to the attenion otl a pupil.

rhe invention is illustratedin the accompanying` drawings, in which, .Figure l is a face view of a dial having time signatures indicated thereon; Figure 2 is tace view ot a dial having key signatures indicated. thereon; Figure 3 is a trent elevational View ot a case embodying therein the time and key dials; Figure l is a modifiez,- tion ot my invention; Figure 5 is a tace view ot the opposite side ot the instrument shown in Figure and Figure 6 is a nio-dii'ied construction of the 'form of the invention shown in Figure el.

in the accompanying drawings:

Fig. l is a diagram of a dial on which are shown the time signatures in general use, that is to say Simple duple, Simple triple, and so on to Compound quadruple, each group in a separate sector with the descriptive designation on the outer ring sector portion and the equivalent symbols (minime and crochets, or crochets and quavers) and their values shown in juxtaposed sequence in the sector within.

Fig. 2 is a diagram ot a dial on which are shown in one part of it the key signature` and in the other part of it the enharmonic relations. The sectors for the former carry the stave and clef on their border portion with the respective major key notations displayed as notes on the stave in the usual way, each major key designator having beside it the designator for the corresponding minor key. The corelation between the major and minor keys is clearly indicated by placing the corresponding major and minor key signatures and enharmonic relations grouped in parallel in the same column in each case and the distinction accentuated by printing them in different colors or otherwise distinctively.

The enharmonic relations are distinguished by printing their indicators in red, the additional lettering, Five flats, Six ilats" and Seven lials`7 being printed in the proper uuarterings to facilitate rapid recognition ot' the symbols.

Fig. 25 a view oi the watch-like instrument with open `faces on either side ot it in which the charts Figs. l. and 2 are respectively mounted, A being a stem windcr device l'or .rotating the spindle E, which liti carries a pointer C at either end of it for indicating'v the particular sector of either chart to which a pupils attention is required to be directed.

Fig. is a perspective view of a cylindrical type indicator. It consists of a cylinder of Wood or papier-mache', which may be hollow, with three circular bands D', E and F set upon it carrying respectively the three charts beforel described With their mattei' arranged in linear tabular order instead of in sector arrangement, and G is a cursor consisting of a bail mounted on stub spindles H* about which it may be moved to bring the bar of the bail into alignment with the particularsection ot any one of the tabulations to Which attention is required to be directed. In this case the three tabulatio'ns may be printed in distinctive colors, so as to Jfacilitate rapid identiiication of :1 ny one trom the others.

"Instead ot a pointer C, apertured discs as shoivn in Fig. 5 may be iixed to the spindle l.' and similiarly in place ot the cursor (it a slotted sleeve, Fig. 6 may be mounted for rotation on the stub spindles H Fig. -4 These alternative' forms of pointers shield the tables from view eX- cepting only the sectors or segments ot them which are exposed through the aper ture K to which for the time being attention is directed.

What I claim as my invention and desire. to .secure by Letters Patent is A pocket instrument for facilitating tuition in music key signatures and in harmonic relation, comprising a dial 'face havin'g a staff ruled marginally about the periphery lav plurality of radial lines disposed on the dial face to form segments in which displayed the respective major and minor key notations corresponding to the keys indicated on the bars of said staff, the corelation between the major and minor key being indicated b'y placing the major and minor Key signatures and enharmon'ic relations in parallel groups in the same column in each case.

In testimony 'whereof I ailix my signaA turc.

CHARLES LOMA N. 

